Charlton pleased to see Ronaldo back

After twice declaring a desire to quit Old Trafford for Real Madrid - both before and after his involvement in Wayne Rooney's World Cup dismissal - Ronaldo checked in as planned for pre-season training on Monday.

"Cristiano wants to be successful," said Charlton. "The more he thinks about it, the more he will realise he is in the right place."

However, Charlton does accept Ronaldo may have to run a gauntlet of abuse at the start of the season, having been singled out as public enemy number one for his part in England's World Cup demise.

Alan Shearer and Frank Lampard have both publicly expressed their disgust at Ronaldo's behaviour and Charlton believes the player himself would now admit he was wrong.

"I think Cristiano realises he has made a mistake which he will have to pay for," said the former England skipper.

"I am sure the fans will have a little go at him at the start of the season.

"He is only a young lad. He is inexperienced and doesn't know a lot about the game. But he will come back better because of this.

"It is going to be tricky for him at the beginning but he is a great player and that is what people should focus on."